andygrove commented on issue #622:
URL: 
https://github.com/apache/datafusion-comet/issues/622#issuecomment-2204903434

   Here are some notes comparing the catalog_sales scan+filter+exchange+sort
   
   ## Spark
   
   - Parquet scan = 1.4 s
   - C2R + Filter (WholeStageCodegen) duration = 39.9 seconds
   - Exchange shuffle write time total = 10.1s
   - Sort (WholeStageCodegen) = 1.3 s, total time 52.1 minutes
   
   
   ## Comet
   
   - Comet Parquet scan = 1.2 s
   - CometFilter 915 ms
   - CometExchange shuffle write time total = not specified
   - C2R (WholeStageCodegen) duration 1 hour
   


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